convener:Osamu Kuwano(Japan Agency for Marine-Earth Science and Technology), Ichiko Shimizu(Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo), Hidemi Ishibashi(Faculty of Science, Shizuoka University), Miki Tasaka(Shimane University), Chairperson:Ichiko Shimizu(Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo)